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Title: Laser beat wave resonant terahertz generation in a magnetized plasma channel

Resonant excitation of terahertz (THz) radiation by nonlinear mixing of two lasers in a ripple-free self created plasma channel is investigated. The channel has a transverse static magnetic field and supports a THz X-mode with phase velocity close to the speed of light in vacuum when the frequency of the mode is close to plasma frequency on the channel axis and its value decreases with the intensity of lasers. The THz is resonantly driven by the laser beat wave ponderomotive force. The THz amplitude scales almost three half power of the intensity of lasers as the width of the THz eigen mode shrinks with laser intensity.
Authors:
;  [1] ;  [2]
  1. Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)
  2. Department of Physics, Raj Kumar Goel Institute of Technology, Ghaziabad, Uttar Pradesh 201003 (India)
Publication Date:
OSTI Identifier:
22493887
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 23; Journal Issue: 2; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLITUDES; EXCITATION; LANGMUIR FREQUENCY; LASERS; MAGNETIC FIELDS; NONLINEAR PROBLEMS; PHASE VELOCITY; PLASMA; PONDEROMOTIVE FORCE; THZ RANGE; VISIBLE RADIATION